Commutator brush



Jan. 16, 1923.

H. G. JUNGK.

COMMUTATOR BRUSH.

FILED MAY 24, 1921.

WITNESSES: INVENTOR Km Herberl" GLJungK ATTORNEY I Patented Jan.16, 1923.

UNITED STATES PATENT OFFICE.

HERBERT G. JUNGK, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

COMMUTATOR BRUSH.

Application filed May 24,

To all whom it may concern.

Be it known that I, IIERBERT G. JUNGK, a citizen of the United States, and a resident of Pittsburgh in the county of Allegheny and State of I ennsylvania, have invented a new and useful Improvement in Commutator Brushes, of Which the following is a specification.

My invention relates to commutator brushes and it has particular relation to shunt attachments therefor.

()ne of the objects of my invention is to provide means for securely fastening a shunt attachment to a carbon brush without the utilization of screws, bolts, clips and the like that are not only relatively expensive but often fracture the relatively fragile carbon of the brush.

Another object is to provide a device of the character designated that will be more eflicient in operation than those heretofore employed and one that will ensure a better electrical contact between the shunt attachment and the brush.

A further object of my invention is to provide a device of the character described in which the brush may have free and un. obstructed movement within the brush holder, throughout its entire length.

In the accompanying drawings,

Figure 1 is a plan view of a brush having a shunt attachment secured thereto in accordance with my invention.

Fig. 2 is a view, partially in side elevation and partially in vertical longitudinal section, of the brush illustrated in Fig. 1.

Referring to the drawings, 1 indicates a commutator brush, of any preferred form or material, one corner of which is inclined or beveled, as at 2. A plurality of substantially parallel holes 3 are drilled, molded or otherwise suitably formed in the body of the brush 1 and extended from the beveled. portion 2 through the brush, at a slight angle to the horizontal, to the opposite side thereof.

The holes 3 are connected by means of a channel or groove t formed in one side of the brush and which joins each of them at their ends which are opposite to the inclined portion 2 of the brush.

A shunt or conductor 5, in the form of a loop, is so threaded through the holes 3 and the channel 4, as illustrated in Flg. 1, that the loop portion 6 thereof will be disposed within the channel 4. Wedges or 1921. Serial No. 472,101.

screws 7 may be inserted in the holes 3, along the sides of the conductors 5, if so desired, to maintain the same against accidental displacement. 7

By this construction, acommutator brush may be provided with a plurality of shunt attachments adapted to be grounded to the brush holder and which cannot become detached from the brush. without first becoming disengaged from the brush holder. Furthermore, by my construction, the employment of screws, clips and so forth, which project beyond the edge of the brush and more or less limit its sliding movement within the brush box is avoided.

l claim as my invention:

'1. A commutator brush having a plurality of substantially parallel holes extending therethrough and connected along one side of said brush, by means of a recess, a continuous conductor in the form of a loop disposed within said holes and said recess, and extending outwardly from said brush to form a plurality of conductors adapted to be secured to a brush holder and means for securing said, conductor within said holes and said recess.

2. A. commutator brush comprising a body portion provided with a channel in one side thereof and with a plurality of recesses extending diagonally through said body portion and communicating with said channel adjacent to each end thereof, and a. continuous conductor disposed in said recesses and said channel and having, the extremities thereof extending outwardly from said body portion to provide a plurality of shunt attachments.

3. A commutator brush comprising a body portion provided with a channel in one side thereof and with a plurality of recesses extending diagonally through said body portion and communicating with said channel adjacent to each end thereof, a continuous conductor disposed in said recesses and said channel. and having the extremities thereof extending outwardly from said body portion to provide a plurality of shunt attachments and a wedge member disposed in one of said apertures to prevent the displacement of said conductor.

In testimonywhereof, I have hereunto subscribed my name this 25th day of April, 1921.

HERBERT o. JUNGK. 

